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RISS 인기검색어
- 검색키워드
- 저자 : Vikas Mahto (검색결과 3 건)
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Tinku Saikia,Vikas Mahto,Amit Kumar 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.52 No.-
The large amount of thermodynamic hydrate inhibitor is required for hydrate inhibition in drillingfluidand causes environmental problem and proved to be uneconomical during deep well drilling. Quantumdots may be the solution for these problems. In this study, carbon dots (CDs) prepared from ethyleneglycol and hydrate inhibition efficiency of CDs were compared with ethylene glycol. THF (Tetrahydrofu-ran) hydrate was used for the testing of hydrate inhibition efficiency at 1 C. The CDs do not affect thedrillingfluid rheology adversely and inhibits the hydrate crystals better than EG. Hence, CDs can beeffectively used in drillingfluid.
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Rajat Jain,Triveni K. Mahto,Vikas Mahto 한국유변학회 2016 Korea-Australia rheology journal Vol.28 No.1
In the present study, polyacrylamide grafted xanthan gum/multiwalled carbon nanotubes (PA-g-XG/ MWCNT) nanocomposite was synthesized by free radical polymerization technique using potassium persulfate as an initiator. The polyacrylamide was grafted on xanthan gum backbone in the presence of MWCNT. The synthesized nanocomposite was characterized by X-ray diffraction technique (XRD), and Fourier transform infrared spectroscopy analysis (FT-IR). The morphological characteristics of the nanocomposite were analyzed by field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM) analyses. Also, its temperature resistance property was observed with Thermogravimetric analysis (TGA). The effect of nanocomposite on the rheological properties of the developed drilling fluid system was analyzed with a strain controlled rheometer and Fann viscometer. Flow curves were drawn for the developed water based drilling fluid system at elevated temperatures. The experimental data were fitted to Bingham, power-law, and Herschel Bulkley flow models. It was observed that the Herschel Bulkley flow model predict the flow behavior of the developed system more accurately. Further, nanocomposite exhibited non-Newtonian shear thinning flow behavior in the developed drilling fluid system. Nanocomposite showed high temperature stability and had a significant effect on the rheological properties of the developed drilling fluid system as compared to conventionally used partially hydrolyzed polyacrylamide (PHPA) polymer.
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Praveen Kumar Jha,Vikas Mahto,Vinod Kumar Saxena 한국유변학회 2018 Korea-Australia rheology journal Vol.30 No.2
A new type of oil-in-water (O/W) Pickering emulsion systems, which were prepared by polymers such as xanthan gum, carboxymethyl cellulose (CMC), and sodium lignosulfonate have been investigated for their properties as multifunctional emulsion muds with respect to rheological control and filtration control properties. Diesel oil was used as dispersed phase and KCl-brine as continuous phase in the developed emulsions. Initially, rheological parameters like apparent viscosity, plastic viscosity, gel strength, and filtration control properties were measured using recommended practices. Emulsion stability was analyzed using steady state shear stress-shear rate and oscillatory (dynamic) rheological measurement techniques. The emulsions were found to exhibit shear-thinning (pseudoplastic) behavior. Experiments conducted for oscillatory rheological measurements have shown that emulsions are stable as per the stability criteria G' (elastic modulus) > G'' (loss modulus) and both are independent of changing ω (Frequency). These fluids have shown stable properties upto 70°C which shows that they can be used as drilling muds for drilling oil and gas wells.
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